663.1 - Millstones, grindstones, grinding wheels and the like, without frameworks, for grinding, sharpening, polishing, trueing or cutting hand sharpening or polishing stones and parts thereof, of natural stone, of agglomerated natural or artificial abrasives or of ceramics, with or without parts of other materials.

663.2 - Natural or artificial abrasive powder or grain, on a base of textile material, of paper, of paperboard or of other materials, whether or not cut to shape or sewn or otherwise made up.